Comment on Space Travel Star Trail by CapturingTheNight

Yes it is multiple shots stacked in "Startrails" [link] The swirls are caused by the rotation of the earth. If you want circles like this, shoot north (northern hemisphere) or shoot south (southern hemisphere) If you want straight lines shoot east or west. The best tutorial I have seen is this one [link] which will tell you everything you need to know to be able to capture something like this yourself. The only difference between doing a startrail and a timelapse is if you want to do both, you need to keep your exposures short enough that the stars do not begin to trail in the individual frames. It depends on your camera and lens but if you keep the exposures no longer than 30 seconds you should be fine (this is assuming that you are doing night time timelapses- if doing daytime then just auto expose and shoot image after image.) Generally timelapses are produced at 15 frames a second so you need a lot of photos to get minutes work of footage. So ideally you need big memory cards and lots of batteries to keep shooting for hours and hours. If you want to set up some kind of dolly to have the camera move and pan during the sequence then you will not be able to produce a startrail image as well. T do both you need to setup on a solid tripod and don't touch anything until you want to end the shoot. I programable remote release for the camera is a huge help to. You can view a couple of my humble timelapses here [link] and here [link]
Hope this helps.